Skip to main content
Ir a la página de inicio de la Comisión Europea (se abrirá en una nueva ventana)
español español
CORDIS - Resultados de investigaciones de la UE
CORDIS
Contenido archivado el 2024-04-19

European Arctic stratospheric ozone experiment - balloon science

Objetivo



The mean total ozone amount derived from wintertime observations over high northern latitudes has been decreasing through the last two decades, as reported by the International Ozone Trends panel (1988). This phenomenon can not be described with time dependent numerical models of stratospheric chemistry that only consider homogeneous gas phase reactions. Results derived from experimental observations in the Arctic Winter stratosphere since 1987 (CHEOPS / AASE) suggest that Arctic air masses may be perturbed to an extend that is comparable to the conditions that lead to the formation of the 'ozone hole' in the Austral stratosphere. There is strong evidence that heterogeneous processes may lead to a strong enhancement of chlorine catalysed ozone destruction cycles. However due to the considerable dynamic activity during Winter, Arctic air masses that are primed for depletion, or that are chemically depleted, may only extend over limited regions and persist over shorter time periods.

This proposal is to perform a series of experimental measurements during the European Arctic Stratospheric ozone Experiment (EASOE), which is planned from early November 1991 to the end of March 1992. The observations will contribute to the primary objectives of EASOE: to study the structure and evolution of the Arctic polar vortex; to investigate the spatial and temporal extend of denitrification and dehydration processes; to search for the evolution and persistence of chemically perturbed air masses as well as for evidence of chemical ozone destruction. The proposed activities include balloon, aircraft, and ground based observations to measure vertical and horizontal profiles of many trace gases including long-lived trace gases and source gases (e.g. N20, CH4, H20, C02, CFCs), of reservoir species (e.g. CIONO2, HCL, N205, HNO3), of reactive compounds (e.g. N02, No, N03, OClO), of aerosols and PSCs, and of the actinic flux. Regular ozone sonde launches will be made at two European sites.

It is hoped that the results of the proposed work - in combination with those obtained from the other experimental and theoretical investigations during EASOE - will contribute to an improved understanding of the potential chemical perturbation of the Arctic stratosphere and of its immediate consequences. A proper description of chemical and dynamic processes and interactions will then allow to formulate atmospheric simulation models that are capable of making improved predictions of the future changes in polar stratospheric ozone. The proposed investigations, therefore, are considered part of an international cooperative effort to investigate the coupled response of the ozone / climate system to man-made perturbations by emissions of chlorine and bromine as well as greenhouse gases.

Ámbito científico (EuroSciVoc)

CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..

Para utilizar esta función, debe iniciar sesión o registrarse

Programa(s)

Programas de financiación plurianuales que definen las prioridades de la UE en materia de investigación e innovación.

Tema(s)

Las convocatorias de propuestas se dividen en temas. Un tema define una materia o área específica para la que los solicitantes pueden presentar propuestas. La descripción de un tema comprende su alcance específico y la repercusión prevista del proyecto financiado.

Convocatoria de propuestas

Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.

Datos no disponibles

Régimen de financiación

Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.

CSC - Cost-sharing contracts

Coordinador

Forschungszentrum Jülich GmbH
Aportación de la UE
Sin datos
Dirección
Wilhelm-Johnen-Straße
52405 Jülich
Alemania

Ver en el mapa

Coste total

Los costes totales en que ha incurrido esta organización para participar en el proyecto, incluidos los costes directos e indirectos. Este importe es un subconjunto del presupuesto total del proyecto.

Sin datos

Participantes (6)

Mi folleto 0 0